RCD failure rate

[radiohead]

It would be interesting to know the kind of failures experienced by the manufacturers, dirt ingress, burnt contacts, overloading, frequent operation, internal component failures or external influence's? Who's going to be first to take one to bits and have a look? unless you have already?

Some years back I got called out by a landlord to a flat with a starbreaker board, two eastern Europeans had partially dismantled the split load RCD (Live!!) because it wouldn't reset. How the feck they hadn't killed themselves I'll never know.

 

[Flanders]

I'd say I've had 50 odd square d rcbos out of about 500 fail this year in a chain of shops I've been testing in. The are about 10 years old and highly doubt they're been tested since they were installed. I expected better of square d however.

It was about 20 years ago I believe That there was re call on square D rcbos .

 

[Mike Johnson]

When did RCBO's first become available?

 

[Jurassic Sparks]

I have noticed the RCDs and RCBOs that are not operated regularly by use of the test button, appear to become coil bound, perhaps some sort of magnetic field builds up, or they just get hot and stick, apart from the ones suffering condensation damage
used to have the same problem with some communications equipment 45 odd years ago
one of us was dispatched to prod the armatures with a proddy thing made for the job, ie insulated, and with a large end that could not go into the contacts when operated by the company imbecile ( me)
one day I will tell you about the fat lady and her park home, but I have just eaten and feel frail